Improvement in spring-bolt fastenings for tongues, whiffletrees



Patented Jan. 26,1875.

n'. PETJHI} wnazases: 3 WM:

STATESP TENT'0FFIoE..-

ErHXnIH. PETTlT, orfirwi'n LAKEMIOHIGAN, ASSIGNOR T0 H DnLnAMARwADE,oEsn n PLACE.

lM'PR-QyE M EN T IN s eame sotT -i FASTfE NlNGs" FO'R 'ToNeu Es.WHIIFFL'E'YI'IREES; t5. 1

f fflpeeifio'ation-iorming part bf Letters nameled] 1 6, dated n w; 26,13:5 application filed "I .1 Septeii'1ber 5-, 1874 I 'f'i n ,10 zpllwhom may concern:

, 1: :Be it kn'ownthat 1, E'THAN nnm; of

- Twin Lake, in the county. of M State-of Michigan, have invented a newand usefullm'p'roveinent in Sprin g-Bolt'Fasteni-n g, of which thefollowingisoaspecification: g The ihventiomtrilli fully. described,

and then pointedpntin'theclaims. Y

Figure l' 's 'a {side view'ofthe deviceapplied, with parts broken awayto show the construction. Fig. 2 is across-section of Fig. 1, takenonthe-line f Similar letters of reference indicate corre- Spending parts.

. A- is 'th'e'tongiie or whiffletree. ,B' is a seinicircular plate onthe end: of the tongue. O is the hook, which is secured inthe'endof-.A,'

Y but is bent. or turned in a semicircle to form an eye, with the bentend- D terminating beiore-it reaches the end of the tongue. Fis' thespring-bol secured to the end of the I tongue by other-semicircles, G."The'semi; circle is not a true-arc of a circle, butbags in onedirection to receive the b'ol t,'yor. is composed of two semicircles- -alarge one, G, and a small one, I. J is a spiralspring within the y Ysmall semicircle, which bears with a constant pressure against the .endof the bolt, and serves to press it outward and against the end 1) ofthe hook. .K is a lug on the bolt,

which extends through a mortise, L, in the casing I, by meansof whichthe bolt is'thrown hack,--so that its end will-he fl sh withthe end ofthe tongue. This leaves an open space at L for the introduction of the harness-straps,

or. the-trace or otherarticle to be secured. The semicircular late-B andthe large semi- 1 eir'ologGf. are brought in contactflon thesides -ofthe tongue, as seen at m, and both are attached' to the tongue by screwsjot-nails, as seen in the drawing. n n are small lugs or guides forkeeping'the-bolt in position.

vThe advantages of this fastening over the fastenings in ordinary useare nr'any, and must be obvious toall. w I

I, am aware that it is not new to provide a whiffletree with aspring-bolt arranged within a] case, the said case having a cap or hookprotector and bearings for the bolt.

' What I- claim is 1. The plate B, having circular portions G and [I toreceivev a tongue-yoke, in the manner described. v

A tongue-yoke consisting of the hook part0 and s rin -held straight partF com:

'bined, and their en'dsmeeting,soas to form a flush-joint, as shown anddescribed.

- E'rHA'N- HLPET IT; Witnesses: 1

' MYRQN o.- WAD-E,

IMSELF AND?

